Question

evaluate by using suitable identies 103*107

Answer 1

Answer :

The required answer is 11030.

Step-by-step explanation :

103 × 107

It can be written as ;

( 100 + 3 ) ( 100 + 7 )

We will use an identity here,

( x + a ) ( x + b ) = x² + bx + ax + ab

( 100 + 3 ) ( 100 + 7 )

⇒ ( 100 )² + ( 3 )² + 7 × 100 + 3 × 100 + (3 × 7)

⇒ 10000 + 9 + 700 + 300 + 21

⇒ 11030

Hence, the required answer is 11030.

Answer 2

here is your answer
(100+3)(100+7)
by using (x+a)(x+b)=x²+(a+b)x+ab
(100+3)(100+7)=100²+(3+7)100+3*7
=10000+1000+21
=11021